		<?php
	$a = null;
  $a =
  	$a + 1;
  $a =
  	$a - 1;
  $a =
  	$a * $a;
  $a =
  	$a / $a;
  $a =
  	$a . $a;
  $a =
  	'hello' . ' world';
  $a =
  	"hello" . " world";
  $a =
  	'hello$a';
  $a = "hello$a";
  	$a += $a;
  $a -= $a;
  $a *= $a;
  $a
  	/= $a;
  $a
  	.= $a;
  $a = $a&&$b&$c;
  $a = $a||$b|$c;
  $a &= $a;
  $a |= $b;
  $a = $f^$g;
  $a^=$g;
  $a=( $b*$c )/( ($d * $e ) ^ $f );

  	$a
  	=
  	!
  	!
  	$a;

	$a/* c */  = /* c */ $a /* c */ /
 /* c */ $a;
	?>
